'''simple docstring'''




def __lowerCAmelCase					(				UpperCamelCase__							,    UpperCamelCase__							)      ->       float:
    return price * (1 + tax_rate)


if __name__ == "__main__":
  print(f'{price_plus_tax(1_0_0, 0.25) = }')
  print(f'{price_plus_tax(125.50, 0.05) = }')

'''simple docstring'''




def __lowerCAmelCase					(				UpperCamelCase__							)      ->       bool:
    if number < 0:
        raise ValueError('''number must not be negative'''							)
    return number & (number - 1) == 0


if __name__ == "__main__":
  import doctest

  doctest.testmod()
